ChemInform Abstract: Chiral Zirconium Complex as Broensted Base Catalyst in Asymmetric Direct-type Mannich Reactions.

ChemInform ◽  
2010 ◽  
Vol 41 (26) ◽  
pp. no-no
Author(s):  
Shu Kobayashi ◽  
Matthew M. Salter ◽  
Yumi Yamazaki ◽  
Yasuhiro Yamashita
Keyword(s):  
Zirconium Complex ◽  
Base Catalyst ◽  
Mannich Reactions

Chiral Zirconium Complex as Brønsted Base Catalyst in Asymmetric Direct-type Mannich Reactions

2010 ◽  
Vol 5 (3) ◽  
pp. 493-495 ◽  
Author(s):  
Shū Kobayashi ◽  
Matthew M. Salter ◽  
Yumi Yamazaki ◽  
Yasuhiro Yamashita
Keyword(s):  
Zirconium Complex ◽  
Base Catalyst ◽  
Mannich Reactions ◽  
Brønsted Base

A chiral organic base catalyst with halogen-bonding-donor functionality: asymmetric Mannich reactions of malononitrile with N-Boc aldimines and ketimines

2018 ◽  
Vol 54 (31) ◽  
pp. 3847-3850 ◽  
Author(s):  
Satoru Kuwano ◽  
Takumi Suzuki ◽  
Yusei Hosaka ◽  
Takayoshi Arai
Keyword(s):  
Halogen Bonding ◽  
Organic Base ◽  
Base Catalyst ◽  
Mannich Reactions

Asymmetric Mannich reactions of malononitrile with various N-Boc imines were developed using a chiral organic base catalyst with halogen-bonding-donor functionality.

Colorimetric Determination of Fluoride in Drinking Groundwater using a Polymeric Zirconium Complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline

2013 ◽  
Vol 12 (7) ◽  
pp. 460-465
Author(s):  
Sameer Amereih ◽  
Zaher Barghouthi ◽  
Lamees Majjiad
Keyword(s):  
Drinking Water ◽  
Detection Limit ◽  
Complex Formation ◽  
Molar Absorptivity ◽  
Colorimetric Determination ◽  
Zirconium Complex ◽  
Reliable Determination ◽  
Percentage Recovery ◽  
Quantitation Limit

A sensitive colorimetric determination of fluoride in drinking water has been developed using a polymeric zirconium complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline as fluoride reagents. The method allowed a reliable determination of fluoride in range of (0.0-1.5) mg L-1. The molar absorptivity of the complex formation is 7695 ± 27 L mol-1 cm-1 at 460 nm. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.0 mg L-1 fluoride for the proposed method were found to be 0.353 ± 0.013 μg mL-1, 0.1 mg L-1, 0.3 mg L-1, and 101.7 ± 4.1, respectively.

Advances on Asymmetric Organocatalyzed Mannich Reactions in Aqueous and Non-aqueous Media

2016 ◽  
Vol 3 (2) ◽  
pp. 133-160 ◽  
Author(s):  
Ayndrila Ghosh ◽  
Sudipto Bhowmick ◽  
Anirban Mondal ◽  
Harekrishna Garai ◽  
Kartick C. Bhowmick
Keyword(s):  
Aqueous Media ◽  
Mannich Reactions

Cesium-modified hollow ZSM-5: efficient acid-base catalyst for side-chain alkylation of 2-picoline with formaldehyde

2021 ◽  
pp. 117983
Author(s):  
Zhe Hong ◽  
Guoqing Zhao ◽  
Chuanfang Xiong ◽  
Wenzhi Jia ◽  
Fangtang Huang ◽  
...  
Keyword(s):  
Side Chain ◽  
Base Catalyst ◽  
Acid Base

scholarly journals Recent advances and prospects in the Zn-catalysed Mannich reaction

RSC Advances ◽  
2021 ◽  
Vol 11 (16) ◽  
pp. 9098-9111
Author(s):  
Salahudeen Shamna ◽  
C. M. A. Afsina ◽  
Rose Mary Philip ◽  
Gopinathan Anilkumar
Keyword(s):  
Carbonyl Compound ◽  
Secondary Amine ◽  
Mannich Reaction ◽  
Mannich Base ◽  
Mannich Reactions ◽  
Recent Advances ◽  
Primary Secondary Amine

Amino alkylation of an acidic α-proton of a carbonyl by formaldehyde and a primary/secondary amine or ammonia, affording a β-amino-carbonyl compound also known as a Mannich base is a valuable reaction. We focus on recent advances in Zn catalysed Mannich reactions.

Asymmetric Synthesis of α‐Difluorinated β‐Amino Sulfones via Detrifluoroacetylative Mannich Reactions

2021 ◽  
Author(s):  
Ziyi Li ◽  
Nana Wang ◽  
Haibo Mei ◽  
Hiroyuki Konno ◽  
Vadim A. Soloshonok ◽  
...  
Keyword(s):  
Asymmetric Synthesis ◽  
Mannich Reactions

scholarly journals Evidence for lysine 80 as general base catalyst of leucine dehydrogenase.

1993 ◽  
Vol 268 (36) ◽  
pp. 27039-27045
Author(s):  
T Sekimoto ◽  
T Matsuyama ◽  
T Fukui ◽  
K Tanizawa
Keyword(s):  
Base Catalyst ◽  
Leucine Dehydrogenase ◽  
General Base
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